MATLAB: Number of non-zero element

arraysMATLAB

I have n-number of arrays, I want to find the total non-zero element at a location. For example there are three arrays as following:
A = [2 0 0 2;
     0 1 1 1;
     1 3 0 0;
     0 1 0 1];
B = [0 2 1 0;
    3 1 1 1;
    2 0 0 2;
    0 1 0 1];
C = [0 2 3 0;
     3 1 2 2;
     4 0 2 1;
     2 0 0 1]
How can I find the total number of non-zero elements in A, B, C for each location, e.g (1,1): 1, (1,2): 2, (1,3): 2 ? To get array D = [1 2 2 1; 2 3 3 3; … ].

Best Answer

D = sum(cat(3,A,B,C)~=0,3);
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